The whole body is hot and weak

In fact, many people have experienced whole body fever and weakness in their lives, but because each person manifests this disease differently, the factors that cause it are also different. Some people say that high body temperature must mean a fever, but this is not the case. Factors that cause whole body fever include infection, malignant tumors, organ lesions and other factors. There is no guarantee that it is related to a cold.

Causes of symptoms

1. Long-term "unexplained" moderate or high fever

This refers to a fever above 38°C that lasts for two weeks or longer, with fever as the main complaint, and the cause of the disease is unknown after medical history, physical examination and routine tests within one week of hospitalization.

1. Infection

(1) Systemic: seen in miliary tuberculosis and disseminated tuberculosis, typhoid and paratyphoid, sepsis and infective endocarditis, and other infections such as brucellosis.

(2) Limitations: It is seen in liver abscess, amebic and bacterial abscess, biliary tract infection, genitourinary tract infection, intra-abdominal abscess such as subhepatic, subdiaphragmatic, paracolonic, periappendiceal, retroperitoneal, and pelvic abscess, etc.

2. Malignant tumors

It is seen in primary liver cancer, lymphoma, malignant histiocytosis, various leukemias, and other various solid cancers, such as lung cancer, kidney cancer, colon cancer, etc.

3. Connective tissue-vascular diseases

Including systemic juvenile rheumatoid arthritis, allergic subsepsis, systemic lupus erythematosus, polyarteritis nodosa, dermatomyositis, etc.

4. Others

Such as granulomatous hepatitis, drug fever, pseudofever, body cavity blood accumulation such as hemothorax, hemoperitoneum, pulmonary infarction, etc.

2. Long-term low fever

Any oral temperature above 37℃ to around 38℃ that lasts for more than one month is called long-term low fever. The causes of long-term low fever can be divided into two categories: organic and functional:

1. Organic low fever

(1) Chronic infection: such as tuberculosis, liver disease, chronic pyelonephritis, chronic biliary tract infection and various focal infections (sinusitis, tooth root abscess, prostatitis, chronic pelvic inflammatory disease, perianal abscess, etc.).

(2) Connective tissue diseases: such as rheumatic fever, rheumatoid arthritis, systemic lupus erythematosus, etc.

(3) Endocrine diseases: such as hyperthyroidism, pheochromocytoma, etc.

(4) Malignant tumors: early lymphoma, metastasis of solid cancer, etc.

2. Functional hypothermia

(1) Physiological low fever: low fever before menstruation, low fever during pregnancy, etc.

(2) Neurogenic hypothermia: summer low fever, primary oral temperature increase, etc.

(3) Low fever after infection.

(III) Hyperthermia

Hyperthermia refers to a fever exceeding 41°C, which is mainly seen in dysfunction of the temperature regulation center, including heatstroke or sunstroke, brain diseases such as severe brain trauma, cerebral hemorrhage, encephalitis and brain tumors, severe pyrogenic reactions and sepsis caused by blood transfusion and infusion contamination, malignant hyperthermia caused by anesthetics, and hyperthermia before death.